Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning NHC estimate
20210522T054006 amsr2_85 66.6 28.4 5.5% 2.9 -2.9 n/a   40.0 kts
20210522T082242 ssmis16_85 288.6 145.1 NaN% NaN NaN n/a   40.0 kts
20210522T090037 ssmi15_85 55.5 28.4 21.9% 1.6 -1.6 n/a   40.0 kts
20210522T092009 ssmis18_85 55.5 17.2 30.1% 0.0 -0.0 n/a   40.0 kts
20210522T194449 ssmis16_85 66.6 28.4 12.3% 4.9 -4.9 n/a   36.5 kts
20210522T202131 ssmi15_85 55.5 6.1 0.0% 1.7 -1.7 n/a   37.0 kts
20210522T204239 ssmis18_85 77.7 39.5 12.3% 3.0 -3.0 n/a   37.3 kts
20210522T221117 ssmis17_85 44.4 17.2 0.0% 8.1 -8.1 n/a   38.5 kts
20210523T062243 amsr2_85 22.2 6.1 17.8% 6.5 -6.5 n/a   39.7 kts
20210523T084426 ssmi15_85 55.5 28.4 0.0% 7.6 -7.6 n/a   37.7 kts
20210523T090650 ssmis18_85 66.6 33.9 1.4% 6.6 -6.6 n/a   37.4 kts
20210523T103532 ssmis17_85 188.7 89.5 75.3% 14.8 -14.8 n/a   36.2 kts
20210523T172533 amsr2_85 77.7 6.1 0.0% 7.2 -7.2 n/a   35.0 kts
20210523T193234 ssmis16_85 122.1 56.1 1.4% 15.1 -15.1 n/a   32.4 kts
20210523T203043 ssmis18_85 22.2 6.1 0.0% 5.1 -5.1 n/a   30.8 kts
20210523T215839 ssmis17_85 33.3 11.7 0.0% 12.0 -12.0 n/a   30.0 kts
20210524T075445 ssmis16_85 210.9 100.6 NaN% NaN NaN n/a   30.0 kts
20210524T085249 ssmis18_85 111.0 50.6 0.0% 11.2 -11.2 n/a   30.0 kts
20210524T102044 ssmis17_85 55.5 22.8 0.0% 4.0 -4.0 n/a   30.0 kts

Key:

Diameter values indicate the estimated surface eyewall diameter (the MI eyewall edge diameter minus 10 km).

Diameter values are red if Ring % <= 65, yellow/brown if Ring % <= 85 and green if Ring % > 85.

"Ring %" is the percentage of the "ring" (eyewall inner boundary) that is 1) colder than the "hot spot" (warmest eye pixel) in the eye by 20K, or 2) the percentage that is a) colder than 232K and b) colder than the "hot spot" by 10K, whichever is greater.

"Tb diff" is the difference between the "hot spot" (warmest eye pixel) and the warmest pixel on the eyewall.

Scores are listed as negative, and not used, when the JTWC or NHC estimated Vmax is <50 kts in order to rule out weak but highly symmetric TCs.

Error messages in intensity scores: -920 is used when the hottest pixel in the eye is <200K, to prevent false positives; -909 is a failure to process (bad input data).